舟水桥片区土壤、蔬菜及玉米中Cd、Pb含量调查与风险评价  

Investigation and Risk Assessment for the Content of Pb and Cd in Soil and Vegetables of Zhoushui Bridge District

作　　者：金茜[1] 曾启华[1] 朱彬[1] 王曼丽[1] 牟青松[1] 

机构地区：[1]遵义师范学院化学化工学院黔北特色资源应用研究实验室,贵州遵义563002

出　　处：《贵州农业科学》2014年第3期199-202,206,共5页Guizhou Agricultural Sciences

基　　金：贵州省教育厅资助项目"中学化学创新实验与高师本科生实验创新能力的培养研究"(12ZYJ007);贵州省科技厅资助项目"废弃药渣栽培姬菇应用技术的研究"[黔教合KY字(2012)071];遵义师范学院资助项目"高师本科教学与实践--中学化学创新实验研究"(12ZYJ007)

摘　　要：为了解舟水桥片区土壤污染情况,于2007—2009年对该区域内的降尘、矿渣、土壤及蔬菜样品中铅、镉重金属元素进行了测定、分析和评价。结果表明,该区域土壤中Cd含量均超过三级标准,其单项污染指数平均值为6.71,最小达2.80,Pb单项污染指数很小,均小于0.7;Cd的潜在生态危害指数(RI)均大于320,该区域土壤环境质量较差,存在较强的生态危害。试验表明,不同种类、不同地点蔬菜中重金属Pb、Cd含量差异较大,且同类蔬菜对Pb、Cd的富集能力不同,不同蔬菜对Pb、Cd的富集能力也不同。总体上说,玉米对Pb、Cd重金属元素的富集能力低,叶菜类较高。To explore the soil pollution status in Zhoushui Bridge District,an investigation for the industrial zone of Zhoushui Bridge was conducted from 2007 to 2009.The contents of Pb and Cd in fall dust,slag,soil and vegetable in this industrial zone were measured,analyzed and evaluated.The results showed that Cd content in the soil exceeded the third grade standard,and the average value of single pollution index for Cd was 6.71,also the minimum value reached 2.80.And the single pollution indexes for Pb were less than 0.7.The potential ecological harm indexes were more than 320,it meant that the environmental quality for soils of this zone was poor,and had reached very or extremely strong ecological harm.The heavy metal content in vegetables of different kinds or different locations varied greatly,and the accumulation ability to Pb and Cd of different vegetables differed too.On the whole the corn has the less accumulation ability to heavy metals like Pb and Cd,but the leafy vegetables have the higher.

关 键 词：蔬菜 土壤 重金属 生态危害 

分 类 号：S657.3[农业科学—果树学]